[USRP-users] Data rate using usrp and grc

Marcus Müller marcus.mueller at ettus.com
Sat Jul 25 09:31:31 EDT 2020


Hi Koyel,

I'm sorry if I'm repeating myself. I see this seems hard to believe, but:

we really can't tell you. We don't know how well your system performs.

Best regards,
Marcus

On 25.07.20 13:32, Koyel Das (Vehere) wrote:
> Hi Marcus,
>
> “as to your previous questions regarding "will my computer be able to
> keep up": We can't tell you how fast your computer and storage is.”
>
> If I use a 10 gbps server and
>
> RAM disk storage or as you said the following:
>
> “Also, setting larger output buffers in the GNU Radio blocks can help,
> too, if you don't need low latency (which you don't need at all, if
> you're just recording). Try setting "2**24" in the min output buffer
> setting in your USRP source's "advanced" tab.”
>
>
>  Then will I be able to write data at 6 gbps ?
>
> Regards,
> Koyel
>
>
>
> Get Outlook for iOS<https://aka.ms/o0ukef>
> ________________________________
> From: Marcus Müller <marcus.mueller at ettus.com>
> Sent: Saturday, July 25, 2020 1:57:49 PM
> To: Koyel Das (Vehere) <koyel.das at vehere.com>; 'USRP-users at lists.ettus.com' <usrp-users at lists.ettus.com>
> Subject: Re: [USRP-users] Data rate using usrp and grc
>
> Hi Koyel,
>
>> Will there be packet drops if USRP source is set at 32 bit complex
> float in grc when receiving at 100 MSPS each from two channels?
>
> as to your previous questions regarding "will my computer be able to
> keep up": We can't tell you how fast your computer and storage is.
>
> Anyway,
>
>> I am unable to set usrp source block in grc to 16 bit complex as then
> the usrp source block is not compatible with file sink which doesn’t
> have option for 16 bit complex
>
> Nothing in GNU Radio cares about the content of the data bytes you're
> pushing around: simply set your file sink to e.g. int, or float, or to
> short with vector length 2, or to byte with vector length 4: Doesn't
> matter, as long as the item size ends up being 32 bits.
>
> Best regards,
>
> Marcus
>
> On 25.07.20 09:43, Koyel Das (Vehere) via USRP-users wrote:
>> Hi,
>>
>> I want to capture data from usrp 2955 using USRP Source block of grc and write to file using file sink block of grc. Will there be packet drops if USRP source is set at 32 bit complex float in grc when receiving at 100 MSPS each from two channels? That makes 2*100e6*64 (32 bit I and 32 bit Q) = 12800e6 or 12.8 gbps. I am unable to set usrp source block in grc to 16 bit complex as then the usrp source block is not compatible with file sink which doesn’t have option for 16 bit complex. Please help
>>
>> Regards,
>> Koyel
>>
>> Get Outlook for iOS<https://aka.ms/o0ukef>
>>
>>
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